:root{--bg:#f6f7f9;--surface:#ffffff;--surface-muted:#f9fafb;--border:#d8dee8;--border-strong:#aeb8c8;--text:#1f2937;--muted:#667085;--blue:#1d4ed8;--blue-dark:#163f9f;--blue-soft:#e8f0ff;--red:#b42318;--red-soft:#fff1f0;--green:#344054;--green-soft:#f2f4f7;--yellow:#344054;--yellow-soft:#f2f4f7;--shadow:0 1px 2px rgba(16,24,40,0.06)}*{box-sizing:border-box}body,html{margin:0;min-height:100%;background:var(--bg);color:var(--text);font-family:Yu Gothic,Meiryo,system-ui,sans-serif}body{font-size:14px}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button{font-family:inherit}.app-shell,.auth-area{min-height:100vh;background:var(--bg)}.login-shell{min-height:100vh;display:grid;place-items:center;padding:24px}.login-card{width:min(100%,460px);background:#ffffff;border:1px solid var(--border);border-radius:8px;box-shadow:var(--shadow);padding:28px}.login-heading{margin-bottom:22px;text-align:center}.login-heading 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